GB1568858A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1568858A – Tyre-building drum
– Google Patents

GB1568858A – Tyre-building drum
– Google Patents
Tyre-building drum

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Publication number
GB1568858A

GB1568858A
GB10233/77A
GB1023377A
GB1568858A
GB 1568858 A
GB1568858 A
GB 1568858A
GB 10233/77 A
GB10233/77 A
GB 10233/77A
GB 1023377 A
GB1023377 A
GB 1023377A
GB 1568858 A
GB1568858 A
GB 1568858A
Authority
GB
United Kingdom
Prior art keywords
drum
sectors
slides
shoulders
tyre
Prior art date
1977-03-10
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB10233/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

VNI I KONSTRUKT I OBORUD DLYA

Original Assignee
VNI I KONSTRUKT I OBORUD DLYA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1977-03-10
Filing date
1977-03-10
Publication date
1980-06-04

1977-03-10
Application filed by VNI I KONSTRUKT I OBORUD DLYA
filed
Critical
VNI I KONSTRUKT I OBORUD DLYA

1977-03-10
Priority to GB10233/77A
priority
Critical
patent/GB1568858A/en

1977-03-11
Priority to DE2710746A
priority
patent/DE2710746C3/en

1977-03-31
Priority to FR7709739A
priority
patent/FR2385521A1/en

1977-04-06
Priority to US05/785,044
priority
patent/US4126507A/en

1980-06-04
Publication of GB1568858A
publication
Critical
patent/GB1568858A/en

Status
Expired
legal-status
Critical
Current

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Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL

B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE

B29D30/00—Producing pneumatic or solid tyres or parts thereof

B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)

B29D30/08—Building tyres

B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums

B29D30/24—Drums

Description

PATENT SPECIFICATION
00 ( 21) Application No 10233/77 ( 22) Filed 10 March 1977 ( 44) Complete Specification published 4 June 1980 ( 51) INT CL 3 B 29 H 17/16 = ( 52) Index at acceptance B 7 C 74 E 6 kt ( 72) Inventors VLADIMIR ALEXEEVICH KIM, JURY V_ 4 IVANOVICH SAMOKHVALOV, BORIS MIKHAILOVICH PETROV, ENGELS KONSTANTINOVICH GOLOUKIN and GALINA NIKOLAEVNA ARTAMONOVA ( 54) AN IMPROVED TYRE-BUILDING DRUM ( 71) We, VSESOJUZNY NAUCHNOISSLEDOVATELSKY I KONSTRUKTORSKY INSTITUT PO OBORUDOVANIJU DLYA SHINNOI PROMYSHLENNOSTI «NIISHINMASH», of prospekt Lenina, 44, Yaroslavl, Union of Soviet Socialist Republics, a corporation organized and existing under the laws of the Union of Soviet Socialist Republics, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: –
The present invention relates to tyre making machinery, more particularly, to tyre building drums It can be used most advantageously in assembling bias tyre casings and in the first stage of assembling heavy-duty radial tyre casings.
There is known a tyre-building drum in the prior art, which comprises sectors with fixedly mounted shoulders and sectors with movably mounted shoulders Said drum sectors are arranged in a uniformly alternate order and are connected by means of pivoted levers to mechanisms for moving the drum sectors and to stationary crosspieces mounted on the drum hub Each mechanism for moving the drum sectors consists of two parts having annular slides Said annular slides are connected to a screw drive and, by means of additional levers, to said pivoted levers Owing to such connection, the slides of the mechanisms for moving the drum sectors move simultaneously in the same direction to either side along the shaft of the screw drive, whereby the levers are given a turning movement and the drum is caused to close or open During such a movement of the levers the drum sectors have radial and axial motions.
With such motions of the drum sectors during the closure of the drum damage may be possibly caused to the inner surface of the tyre casing Moreover, due to the axial movement of the drum sectors, the drum has considerable axial dimensions when closed and thereby the overall dimensions of the whole tyre-building arrangement are increased.
When closed the, drum also has a large radial dimension because of the crosspieces mounted on the drum hub and on the score of the fact that the movably mounted shoulders move throughout the drum closure process, which necessitates the use of specifically profiled shoulders and thereby restricts the possibility of using the drum for assembling various tyre casings.
Furthermore, the pivots of the lever joints are located in the grooves provided in the drum sectors and, by reason of the clearances involved, the drum sectors become seized in the process of drum opening and so the drum sectors cannot be joined to form a whole rigid envelope Therefore, in order to hold the drum sector fixed when the drum is open, the pivoted levers are locked by manually operating a locking device and thus automation of the tyre casing assembly and removal is made impossible.
It is an object of the present invention to eliminate the disadvantages described above.
The invention provides a tyre-building drum comprising a drum hub, first drum sectors with fixedly mounted shoulders and second drum sectors with movably mounted shoulders, said first and second drum sectors alternating around the circumference of the drum, mechanisms for moving the first and second sectors in a radial direction, each of said mechanisms comprising two symmetrically disposed parts each part having an annular slide and levers each of which is articulated to a respective drum sector and to the slide and each of which has a toothed sector, the toothed sectors of the levers articulated to a respective drum sector being directly or indirectly interengaged to ensure only radial movement of the drum sectors, the slides being mounted coaxially on the drum hub and the slides of the two symmetrically disposed parts which effect radial movement of the second sectors being connected to nuts of a right and left-hand threaded drive screw and being movable in mutually opposite directions and relative to both the drum hub and the slides which effect radial movement of the first sectors during an initial period of drum ( 11) 1 568 858 ( 19) (t K 1,568,858 closure and being movable in said mutually opposite directions relative to the drum hub but together with the slides which effect radial movement of the first sectors during a subsequent period of drum closure, the toothed sectors of the levers connected to the second drum sectors being connected to the movably mounted shoulders for effecting movement and dwell thereof, adjacent drum sectors being interconnected on the inward side by means of pivoted links.
This arrangement of the slides enables the parts of each mechanism for moving the drum sectors to travel at the same speed The interconnection of the parts in each mechanism enables both the drum sectors with fixedly mounted shoulders and the drum sectors with movably shoulders to be moved only in the radial direction This, in turn, minimises the axial dimensions of the drum in a closed state, as well as the dimensions of the whole tyre-building arrangement, and to prevent the possibility of damaging the inner surface of the tyre casing when removing the latter from the drum Also the axial rigidity of the drum becomes greater.
The coaxial mounting of the slides and their ability to move together and separately provide that only the drum sectors with movably mounted shoulders travel during the initial period of drum closure This feature excludes the possibility of the drum sectors becoming seized and ensures the necessary difference between the radial strokes of the drum sectors with movably mounted shoulders and those with fixedly mounted shoulders.
Preferably the drum hub has a longitudinally extending slot and accommodates the screw drive By provision of intermediate elemeats fitting through the lengthwise slot in the drum hub, said two nuts are fixedly secured to the slides incorporated in said parts of the mechanism for moving the drum sectors with movably mounted shoulders Mounted on the screw between the nuts is an abutment which has a projection adapted to interact with a projection provided on the face of one of the nuts.
The lengthwise slot provided in the drum hub makes it possible to accommodate the screw drive inside the hub so as to give compactness to the slide driving mechanism.
By provision of the intermediate elements fitting through the lengthwise slot in the drum hub the slides in each part of the mechanism for moving the drum sectors are prevented from turning relative to each other, whereby steady position of all the drum sectors is ensured The abutment with the projection adapted to interact with the projection on the face of one of the nuts provides against selftightening of the screw pair at the extreme positions of the nut.
Preferably, the slides incorporated in the parts of the mechanisms for moving the drum sectors have flange projections adapted to interact with each other when the slides move together, and the slides incorporated in the parts of the mechanism for moving the drum sectors with fixedly mounted shoul 70 ders are arranged to move axially on the slides incorporated in the parts of the mechanism for moving the drum sectors with movably mounted shoulders.
By providing the flange projections and 75 arranging for the slides to have a relative axial movement, the drum sectors are enabled to move in the sequence which precludes their interference (overlapping) and seizure.
Preferably, the flange projections on the 80 slides incorporated in the parts of the mechanism for moving the drum sections with fixedly mounted shoulders are provided with adjusting screws.
Said adjusting screws provide a means of 85 compensating for imperfections of manufacture and wear of the movable joints as well as a means of establishing the joining force required for the drum sections to form a whole cylindrical drum surface 90 The feature whereby the toothed sectors of the levers associated with said second drum sectors are connected to the associated movably mounted shoulders by mechanisms for effecting movement and dwell of said shoulders 95 obviates seizure of the drum sectors in the process of drum closure and provides the necessary stroke and dwell of the drum section shoulders, with the pivoted levers moving further continuously, said dwell making it 100 possible to obviate limitation of the travel of the other components of the mechanisms for moving the drum sectors and over lapping of the shoulders in the drum when the latter is in a closed state, and to provide the position 105 of the shoulders necessary for obtaining the minimum radial dimensions of the drum in a closed state.
Conveniently, each mechanism for effecting movement and dwell of the shoulders is con 110 structed in the form of an arc-shaped groove provided in the drum sector, a link adjustable for length and articulated to the shoulder, and an intermediate link which provides an articulated connection between said link and 115 the toothed sector and has a pin arranged to fit into the arc-shaped groove.
This constructional arrangement makes for small radial dimensions of the drum in a closed state, obviates seizure of the movably 120 and fixedly mounted shoulders during the initial period of drum closure and, with the pivoted levers moving further continuously, effects dwell of the movably mounted shoulders by virture of the pin fitted in the arc 125 shaped groove The link adjustable for length provides for setting the width of the drum to suit the size of the tyre casings involved.
Alternatively, each mechanism for effecting movement and dwell of the shoulders may be 130 1,6 5 constructed in the form of a link and a toothed rack which are articulated to each other, said link being adjustable for length and said toothed rack having an arc-shaped recess and being in mesh with the toothed sector, which toothed sector has a projection congruent with the arc-shaped recess in the toothed rack This construction gives compactness to the drum sectors with movably mounted shoulders.
It is desirable that the arc-shaped recesses in the toothed racks and the corresponding projections on the toothed sectors be located at different distances from the centres of respective toothed sectors, as measured along the axis of the drum By this arrangement the shoulders are given different strokes so as to preclude overlapping of the shoulders on adjacent drum sectors during drum closure This also obviates seizure of the drum sectors and makes it possible to avoid cutouts in the shoulders with consequent improvement of the quality of tyre casing assembly.
The feature whereby adjacent drum sectors are interconnected on the inward side by means of pivoted links permits the drum sectors with fixedly mounted shoulders to be located axially with respect to the drum sectors with movably mounted shoulders and thereby obviates overlapping of the shoulders and seizure of the drum sectors.
Advantageously, the drum sectors with movably mounted shoulders are provided with abutments adapted to contact adjacent drum sectors when the drum is in an open state, whereas the drum sectors with fixedly mounted shoulders are provided with inclined guides between which are located said abutments.
When the drum is opened, the sectors are locked by the abutments, whereby a whole cylindrical envelope is formed, the rigidity of the structure is increased and the working load is taken up by all the sectors The inclined guides provided on the drum sectors with fixedly mounted shoulders orientate the radial position of the drum sectors with movably mounted shoulders, thereby eliminating the influence of wear in the joints of the pivoted levers on the relative radial position of the drum sectors and, consequently, extending the service life of the drum.
It is desirable that idler gears be provided between the toothed sectors relating to the drum sectors with fixedly mounted shoulders.
Thus, the tyre-building drum constituting the present invention has a greater closure coefficient whilst it has no removable sector shoulders When the drum is closed, its shape approximates a cylinder the diameter of which is smaller than the tyre bead diameter This provides for eliminating hand labour and employing mechanized and automated methods of removing assembled tyre casings, at the same time enhancing the quality of tyre assembly and increasing working efficiency.
The drum comprises sectors similar in construction and features readily manufacturable and labour saving design The provision for adjustment enables the drum to function for a long period without repairs The drum can 70 be used for assembling a wide range of tyre casings, in particular those of heavy-duty type.
Now the invention will be described in detail with reference to the accompanying 75 drawings in which: Figure 1 is a longitudinal sectional view of one embodiment of a tyre-building drum constructed according to the invention.
Figure 2 is a longitudinal sectional view 80 of the drum hub and the screw drive.
Figure 3 shows a modification of the mechanism shown in Figure 1 for effecting movement and dwell of the drum section shoulders.
Figure 4 shows another embodiment of 85 the mechanism for effecting movement and dwell of the drum section shoulders.
Figure 5 is a fragmentary longitudinal sectional view of the drum of Figure 4 in a closed state 90 Figure 6 is a cutaway side elevational view of the drum in an open state.
Figure 7 is a fragmentary view showing the position of the drum sectors with the drum open 95 Figure 8 is same as in Figure 7, showing section through the abutments.
Figure 9 is a cutaway side elevational view of the drum in a closed state.
The tyre-building drum constituting the 100 present invention comprises drum sectors 1 (Figure 1) with fixedly mounted shoulders 2 and drum sectors 3 with movably mounted shoulders 4, said drum sectors alternating around the circumference of the drum; a 105 mechanism for moving the drum sectors 1 consisting of two similar parts 5 and 6; a mechanism for moving the drum sectors 3 consisting of two similar parts 7 and 8; a drum hub 9 in the form of a hollow shaft 110 and connected to a hollow driving shaft 10 (drawn in thin lines).
The drum hub 9 (Figure 2) has two longitudinally extending slots 11 and accommodates a conventional screw drive comprising a right 115 and left-hand threaded screw 12 and two nuts 13 and 14 which are also threaded right and left-hand Mounted on the screw 12 between the nuts 13 and 14 is an abutment having a projection 16 The screw 12 has 120 a rectangular tailpiece connected to a driving shaft 17 which passes through the hub 9 and the hollow driving shaft 10 (Figure 1) An abutment 18 having a projection 19 is secured on the tailpiece of the screw 12 (Figure 2) 125 The nut 13 has projections 20 provided on the face thereof and adapted to interact with the projection 16 on the abutment 15 and with the projection 19 on the abutment 18.
Each of the parts 5 and 6 (Figure 1) of 130 1,568,858 1,568,858 the mechanism for moving the drum sectors 1 comprises an annular slide 21 and levers 22 the ends of which are articulated to the drum sectors 1 and the slide 21.
Each of the parts 7 and 8 of the mechanism for moving the drum sectors 3 comprises an annular slide 23 and levers 24 the ends of which are articulated to the drum sectors 3 and the slide 23.
The slides 21 and 23 in the parts 5 and 7, the same as the identically numbered slides in the parts 6 and 8 of the mechanisms for moving the drum sectors 1 and 3, are coaxially mounted on the drum hub 9 and are adapted to move together and separately, the slides 21 and 23 in the parts 5 and 7 and the identically numbered slides in the parts 6 and 8 being adapted to move on the hub in mutually opposite directions.
To effect this movement, the slides 23 are constructed in the form of cylinders having projections 25 on which are mounted articulated levers 24, said cylinders being mounted directly on the hub 9 as shown in Figures 1 and 2.
The slides 21 are mounted on the slides 23 and are held thereon by projections 26 (Figure 2) which fit into longitudinally extending grooves 27 provided in the slides 23, whereby the slides 21 can move axially on the slides 23.
The slide 23 in the part 7 is fixedly connected to the nut 14 through an intermediate element 28, for example, a key fitting through the slot 11 in the hub 9 The slide 23 in the part 8 is fixedly connected to the nut 13 through an identical intermediate element 28.
Therefore, rotation of the screw 12 causes the slides to move in mutually opposite directions For the slides 21 and 23 to move together, the slides 21 have flange projections 29 with an adjusting screw 30 and the slides 23 have flange projections 31 which can be made in the form of nuts The end of the slide 21 interacts with the flange projection 31, the screw 30 provided in the projection 29 interacts with the projection 25 on the slide 23.
The parts in each of the mechanisms for moving the drum sectors are interconnected by means of toothed sectors provided on the levers 22 and 24 Thus, the levers 22 in the parts 5 and 6 of the mechanism for moving the drum sectors 1 have toothed sectors 32 interacting with each other by means of gears 34 The levers 24 in the parts 7 and 8 of the mechanism for moving the drum sectors 3 have toothed sectors 33 in constant mesh with each other The toothed sectors 33 incorporated in the parts 7 and 8 of the mechanism for moving the drum sectors 3 have mechanisms 35 for effecting movement and dwell of the shoulders 4 The mechanisms 35 are connected with the shoulders 4 and the toothed sectors 33.
As can be seen from Figure 1 the mechanisms 35 may be constructed so that the shoulders are secured directly to a rack 41.
As one alternative, the mechanisms for effecting movement and dwell of the shoulders 4 may be constructed as shown in Figure 3.
Each mechanism 35 comprises a link 40 and toothed rack 41 which are articulated to each other The link 40 is adjustable in length, i e.
of telescopic construction, and is articulated to the shoulder 4 of the drum sector 3 The toothed rack 41 has an arc-shaped recess 42 and is in mesh with the toothed sector 33 which has a projection 43 congruent with the arc-shaped recess 42 in the toothed rack 41.
Advantageously, the arc-shaped recesses 42 in the toothed racks 41 and the corresponding projections 43 on the toothed sectors 33 are located at different distances 11 and 12 from the centres of the respective toothed sectors, as measured along the axis of the drum.
As another alternative, the mechanism 35 may be constructed as shown in Figs 4 and Each mechanism comprises an arc-shaped groove 36 provided in the drum sector 3, a link 37 and an intermediate link 38, for example, a plate articulated to the link 37 and the toothed sector 33 and having a pin 39 arranged in the arc-shaped groove 36 The link 37 is adjustable for length, i e of telescopic construction, and is articulated to the shoulder 4 of the drum sector 3.
Adjacent drum sectors 1 and 3 (Figure 6) are interconnected on the inward side by means of pivoted links 44 and 45 For the purpose of connecting the links and permitting them to pivot relative to each other, the link 44 is provided with a slot 46 into which fits a pin 47 provided on the link 45.
To give rigidity to the drum in an open state, the drum sectors 3 (Figure 7) are provided with abutments 48 adapted to contact adjacent drum sectors 1 when the drum is in an open state, whereas the drum sectors 1 are provided with inclined guides 49 between which are located the abutments 48 Besides, the drum sectors 1 (Figure 1) are provided with adjusting abutments 50 adapted to contact the levers 22 when the drum is in an open state.
For normal functioning of the drum, the latter should be provided with any braking device known in the art.
The drum operates as follows:
After the tyre casing has been built on the drum by a method known in the art, the hub 9 (Figure 2) is braked The shaft 17, rotating together with the screw 12, moves the nuts 13 and 14 in the mutually opposite directions, off the abutment 15 The nuts 13 and 14 move in the same directions the slides 23 incorporated in the parts 7 and 8, thereby causing the levers 24 to turn and thus to move the drum sectors 3 radially inwardly, i e.
toward the hub 9 It will be noted that the 5,6,5 slides 23 move on the hub 9, whereas the slides 21 remain stationary with respect to.
the hub 9.
As the levers 24 move, the toothed sectors 33 turn and move the links 37 as shown in Figure 5 or, according to another embodiment (Figure 3), interact with the toothed racks 41 and the latter turn the movably mounted shoulders 4 inward After the teeth on toothed racks 41 and the teeth on the toothed sectors 33 disengage, the arc-shaped projections 43 provided thereon enter the arc-shaped recesses 42 in the toothed racks 41 In this way the toothed racks 41 and, consequently, the shoulders 4 are caused to dwell during the further process of drum closure.
After the shoulders 4 have been moved inward, the slides 21 (Figure 2) start moving due to the fact that the projections 25 on the slides 23 abut against the screws 30 fitted in the slides 21 The movement of the slides 21 causes the levers 22 to turn and thus to move the drum sectors 1 radially inwardly, i e toward the drum hub During this period, up to the end of drum closure, the slides 21 and 23 move simultaneously and, consequently, the drum sectors 1 and 3 move radially inward also simultaneously.
When the drum is in a closed state as shown in Figure 9, the drum sectors 1 and 3 are locked in position by the abutment 18 (Figure 2) whose face projection 19 contacts the projection 20 provided on the face of the nut 13 Apart from the locking action, this arrangement provides against self-tightening of the nuts 13 and 14 on the screw 12.
When the drum is in a closed state, its diameter is smaller than the bead diameter of the assembled tyre casing and therefore the latter can be easily removed from the drum.
The drum is opened in the reverse manner of closure When the drum is in an open state, the drum sectors 1 and 3 are locked in position by the abutments 48 (Figure 7), the adjustable abutments 50 (Figure 1) and the abutment 15 whose face projection 16 contacts the projection 20 provided on the face so of the nut 13 and thereby prevents selftightening of the screw pair during the drum opening process.
To obtain the drum parameters required in service, the stroke of the slides 21 on the slides 23 is adjusted by the use of the adjusting screws 30 and by varying the position of the projection 31, and the stroke of the slide 23 is adjusted by relocating the abutment 18 and securing it in position with the screw.
This constructional arrangement provides for establishing the required position of the drum sectors 1 and 3 with the drum closed and open, respectively, and for offsetting wear of the movable connections and imperfections as of manufacture.
During the process of drum opening the abutments 48 (Figure 7) of the drum sectors 3 become located between the inclined guides 49 (Figure 8) When the drum is open, the drum sectors 1 (Figure 7), bearing upon the abutments 48, form a rigid structure, which is conducive to high-quality manufacture of tyre casings.

Claims (9)

WHAT WE CLAIM IS –

1 A tyre-building drum comprising a drum 75 hub, first drum sectors with fixedly mounted shoulders and second drum sectors with movably mounted shoulders, said first and second drum sectors alternating around the circumference of the drum, mechanisms for moving 80 the first and second sectors in a radial direction, each of said mechanisms comprising two symmetrically disposed parts each part having an annular slide and levers each of which is articulated to a respective drum sector and 85 to the slide and each of which has a toothed sector, the toothed sectors of the levers articulated to a respective drum sector being directly or indirectly interengaged to ensure only radial movement of the drum sectors, the slides being 90 mounted coaxially on the drum hub and the slides of the two symmetrically disposed parts which effect radial movement of the second sectors being connected to nuts of a right and left-hand threaded drive screw and being 95 movable in mutually opposite directions and relative to both the drum hub and the slides which effect radial movement of the first sectors during an initial period of drum closure and being movable in said mutually opposite 100 directions relative to the drum hub but together with the slides which effect radial movement of the first sectors during a subsequent period of drum closure, the toothed sectors of the levers connected to the second 105 drum sectors being connected to the movably mounted shoulders for effecting movement and dwell thereof, adjacent drum sectors being interconnected on the inward side by means of pivoted links 110

2 A tyre-building drum as claimed in Claim 1, in which the drum hub has a longitudinally extending slot and accommodates the screw drive, the two nuts of which, by provision of intermediate elements fitting through the slot 115 in the drum hub, are fixedly secured to the slides of the two symmetrically disposed parts for moving the drum sectors with movably mounted shoulders, an abutment being mounted on the screw between the nuts, which 120 abutment has a projection adapted to interact with a projection provided on the face of one of the nuts.

3 A tyre-building drum as claimed in Claims 1 or 2, in which the slides incorporated 125 in the parts of the mechanisms for moving the drum sectors have flange projections adapted to interact with each other when the slides move together, and the slides in1,568,858 1,568,858 corporated in the parts of the mechanism for moving the drum sectors with fixedly mounted shoulders are arranged to move axially on the slides incorporated in the parts of the mechanism for moving the drum sectors with movably mounted shoulders.

4 A tyre-building drum as claimed in Claim 3, in which the flange projections on the slides incorporated in the parts of the mechanism for moving the drum sections with fixedly mounted shoulders are provided with adjusting screws.

A tyre-building drum as claimed in Claim 1, in which each mechanism for effecting movement and dwell of said shoulders is constructed in the form of an arc-shaped groove provided in the drum sector, a link adjustable for length and articulated to said shoulder, and an intermediate link which provides an articulated connection between said link and the toothed sector and has a pin arranged to fit in the arc-shaped groove.

6 A tyre-building drum as claimed in Claim 1, in which each mechanism for effecting movement and dwell of said shoulders is constructed in the form of a link and a toothed rack which are articulated to each other, said link being adjustable for length and said toothed rack having an arc-shaped recess and being in mesh with the toothed sector which has a projection congruent with the arc-shaped recess in the toothed rack.

7 A tyre-building drum as claimed in Claim 6, in which the arc-shaped recesses in the toothed racks and the corresponding projections on the toothed sectors are located at different distances from the centres of the respective toothed sectors, as measured along the axis of the drum.

8 A tyre-building drum as claimed in Claims 1 to 7, in which the drum sectors with movably mounted shoulders are provided with abutments adapted to contact adjacent drum sectors when the drum is in an open state, whereas the drum sectors with fixedly mounted shoulders are provided with inclined guides between which are located the abutments.

9 A tyre-building drum as claimed in Claims 1 to 7, in which idler gears are provided between the toothed sectors relating to the drum sectors with fixedly mounted shoulders.
A tyre-building drum substantially as described herein with reference to the accompanying drawings.
MARKS & CLERK, Chartered Patent Agents, 57 60 Lincolns Inn Fields, London, WC 2 A 3 LS, Agents for the Applicants.
Printed for Her Majesty’s Stationery Office by the Courier Press, Leamington Spa, 1980.
Published by the Patent Office, 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.

GB10233/77A
1977-03-10
1977-03-10
Tyre-building drum

Expired

GB1568858A
(en)

Priority Applications (4)

Application Number
Priority Date
Filing Date
Title

GB10233/77A

GB1568858A
(en)

1977-03-10
1977-03-10
Tyre-building drum

DE2710746A

DE2710746C3
(en)

1977-03-10
1977-03-11

Tire building drum

FR7709739A

FR2385521A1
(en)

1977-03-10
1977-03-31

TIRE ENCLOSURE DRUM

US05/785,044

US4126507A
(en)

1977-03-10
1977-04-06
Tire-building drum

Applications Claiming Priority (4)

Application Number
Priority Date
Filing Date
Title

GB10233/77A

GB1568858A
(en)

1977-03-10
1977-03-10
Tyre-building drum

DE2710746A

DE2710746C3
(en)

1977-03-10
1977-03-11

Tire building drum

FR7709739A

FR2385521A1
(en)

1977-03-10
1977-03-31

TIRE ENCLOSURE DRUM

US05/785,044

US4126507A
(en)

1977-03-10
1977-04-06
Tire-building drum

Publications (1)

Publication Number
Publication Date

GB1568858A
true

GB1568858A
(en)

1980-06-04

Family
ID=27432193
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB10233/77A
Expired

GB1568858A
(en)

1977-03-10
1977-03-10
Tyre-building drum

Country Status (4)

Country
Link

US
(1)

US4126507A
(en)

DE
(1)

DE2710746C3
(en)

FR
(1)

FR2385521A1
(en)

GB
(1)

GB1568858A
(en)

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* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

JPS5463184A
(en)

1977-10-28
1979-05-21
Bridgestone Tire Co Ltd
Tire forming drum

DE3126738C2
(en)

1981-07-07
1984-07-19
Jaroslavskij Politechničeskij Institut, Jaroslavl

Pneumatic tire building drum

FR2509663A1
(en)

1981-07-20
1983-01-21
Inst Oboru Dlya Shin
Tyre assembling drum with radially expanding segments – operated by simple lever mechanism and axially sliding blocks

US4445963A
(en)

1981-12-16
1984-05-01
Cooper Tire & Rubber Company
Belt-tread stock assembly drum

US4929298A
(en)

1988-05-13
1990-05-29
The Goodyear Tire & Rubber Company
Tire building drum including an expandable segmental cylinder assembly and a vacuum chamber

US5047108A
(en)

1990-03-09
1991-09-10
Wyko, Inc.
Tire building drum for fabricating high profile type tire carcasses

ATE298662T1
(en)

2001-01-15
2005-07-15
Michelin Soc Tech

SHAPING DRUM FOR TIRE PRODUCTION

US6863106B2
(en)

2001-09-21
2005-03-08
The Goodyear Tire & Rubber Company
Expandable tire building drum with alternating fixed and expandable segments, and contours for sidewall inserts

GB0506363D0
(en)

2005-03-30
2005-05-04
Wyko Equip
Tyre building drum

WO2012006615A1
(en)

2010-07-09
2012-01-12
Wyko Tire Technology, Inc.
Anti-flex assembly

US8505605B2
(en)

2010-08-10
2013-08-13
Bps Engineering, Llc
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2013-06-07
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DRUM AND METHOD FOR ASSEMBLING A PNEUMATIC ADAPTER ON A RIM

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1966-03-11
1967-05-12
Dunlop Sa

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1977

1977-03-10
GB
GB10233/77A
patent/GB1568858A/en
not_active
Expired

1977-03-11
DE
DE2710746A
patent/DE2710746C3/en
not_active
Expired

1977-03-31
FR
FR7709739A
patent/FR2385521A1/en
active
Granted

1977-04-06
US
US05/785,044
patent/US4126507A/en
not_active
Expired – Lifetime

Also Published As

Publication number
Publication date

FR2385521B1
(en)

1980-04-11

DE2710746B2
(en)

1981-05-27

DE2710746C3
(en)

1982-01-21

US4126507A
(en)

1978-11-21

FR2385521A1
(en)

1978-10-27

DE2710746A1
(en)

1978-09-14

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